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Some YouTube Premium subscribers complain of seeing ads
(www.androidheadlines.com)
This is a most excellent place for technology news and articles.
You can on any iOS device without jailbreaking. Look into AltStore or Sidestore. The caveat is that you can only sign 3 apps at a time, and must resign these apps every week - which is done over your WiFi to a PC running AltStore server.
If you have a $99/year Apple developer account, you can use AltStore to sign as many apps as you like, and you only need to resign once per year.
"Look what they have to do to mimic a fraction of our power!" -Android users